Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionChecchi Capital Advisers, LLC
Latest Disclosed Ownership595 shares
Latest Disclosed Value $ 459,721
Checchi Capital Advisers, LLC reports 22.93% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 4, 2026 - Checchi Capital Advisers, LLC filed a 13F-HR form disclosing ownership of 595 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $459,721 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 484 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 22.93% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-04 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 595 111 22.93 460 23.06 0.0232
2026-01-27 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 484 0 0.00 374 37.13 0.0191
2025-11-05 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 484 -248 -33.88 272 -29.17 0.0141
2025-07-22 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 732 50 7.33 384 -11.11 0.0215
2025-04-29 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 682 9 1.34 433 -9.81 0.0228
2025-02-05 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 673 -19 -2.75 479 -34.11 0.0279
2024-11-04 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 692 -1 -0.14 727 -0.14 0.0406
2024-07-26 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 693 3 0.43 728 9.64 0.0365
2024-04-25 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 690 23 3.45 664 13.50 0.0519
2024-02-07 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 667 46 7.41 586 14.48 0.0476
2023-11-13 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 621 -36 -5.48 511 8.26 0.0474
2023-08-10 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 657 8 1.23 472 -11.44 0.0422
2023-05-08 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 649 19 3.02 533 17.40 0.0515
2023-02-10 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 630 -99 -13.58 455 -9.56 0.0472
2022-11-09 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 729 12 1.67 502 20.38 0.0469
2022-08-11 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 717 118 19.70 417 -0.24 0.0361
2022-05-09 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 599 69 13.02 418 24.78 0.0355
2022-02-09 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 530 4 0.76 335 5.35 0.0294
2021-11-09 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 526 23 4.57 318 13.17 0.0315
2021-08-06 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 503 -85 -14.46 281 1.08 0.0277
2021-05-10 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 588 -74 -11.18 278 -13.12 0.0275
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 662 -49 -6.89 320 -19.60 0.0330
2020-11-10 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 711 5 0.71 398 -9.55 0.0441
2020-08-12 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 706 79 12.60 440 43.79 0.0526
2020-05-07 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 627 -25 -3.83 306 24.90 0.0293
2020-02-07 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 652 652 245 0.0328
2019-08-06 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -487 -100.00 0 -100.00
2019-05-09 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 487 487 200 0.0234
2019-02-07 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -689 -100.00 0 -100.00
2018-10-29 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 689 22 3.30 278 20.87 0.0320
2018-08-06 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 667 38 6.04 230 5.99 0.0289
2018-05-01 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 629 -12 -1.87 217 -9.96 0.0286
2018-02-02 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 641 101 18.70 241 0.00 0.0324
2017-11-02 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 540 -22 -3.91 241 -12.68 0.0243
2017-08-03 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 562 -64 -10.22 276 13.58 0.0300
2017-05-03 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 626 29 4.86 243 10.96 0.0280
2017-01-25 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 597 -42 -6.57 219 -14.79 0.0295
2016-11-10 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 639 53 9.04 257 25.37 0.0290
2016-07-21 2016-06-30 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 586 -21 -3.46 205 -6.39 0.0234
2016-05-02 2016-03-31 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 607 -120 -16.51 219 -44.56 0.0487
2016-02-03 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 727 193 36.14 395 59.27 0.0996
2015-10-23 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 534 9 1.71 248 -7.46 0.0673
2015-08-04 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 525 -26 -4.72 268 7.63 0.0707
2015-05-07 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 551 36 6.99 249 18.01 0.0736
2015-01-26 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 515 515 211 0.0792
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.